Malachite

Cu₂(CO₃)(OH)₂

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A vivid green copper carbonate (Cu2(CO3)(OH)2), malachite has been used as a pigment and gemstone for thousands of years. It crystallizes in the monoclinic system, most commonly as botryoidal, stalactitic, or banded massive aggregates whose concentric green bands make it a favorite for decorative objects. The mineral is translucent with a vitreous luster, a light-green streak, and perfect {201} cleavage; its Mohs hardness is 3.5 to 4 and its specific gravity 3.60 to 4.00. Malachite forms in the oxidized zones of copper deposits, frequently alongside azurite. A light-green streak and perfect cleavage help confirm the mineral where weathering has dulled its surface.

Malaquita é um mineral vívido de carbonato de cobre verde usado como pigmento desde a antiguidade.

Sistema Cristalino	Monoclinic
Classe Mineral	05 Carbonates and Nitrates
Dureza Mohs	3.5-4.0
Gravidade Específica	3.60-4.00
Cor	Bright green, dark green
Brilho	Vitreous
Traço	Light green
Clivagem	Perfect {201}
Fratura	Subconchoidal to uneven
Transparência	Translucent
Hábito Cristalino	Botryoidal, stalactitic, banded massive